Sushi Dokoro Ginpachi
The most celebrated sushi restaurant on Hachijo Island, offering both traditional 'shima sushi' (local fish marinated in soy sauce, served with mustard instead of wasabi) and classic Edo-mae nigiri. Locals say 'For island sushi, Ginpachi is the place.' Tabelog 3.44 (184 reviews), Jalan 4.3 (13 reviews). About 10 minutes from the airport. Reservations recommended.
Reviews say 'You can't get sushi of this quality for this price in Tokyo' and 'I came to Hachijo Island just to eat island sushi here.' Popular with both locals and tourists. Consistent high ratings across Tabelog, Jalan, and Yahoo Maps. No signs of fake reviews.